border

UK[ˈbɔ:də(r)] US[ˈbɔ:rdə(r)]

n.Border; edge; edging; wrapping Edge

vt.& vi. Bound with, on the edge of...

vt. Along the edge of, surround..., edge...

vi. Approximate, adjacent

Third person singular: borders Plural: borders Present participle: bordering Past tense: bordered Past participle: bordered

top

英[ tɒp] 美[tɑ:p]

n. Top, top; (box) cover, (book pages, etc.) upper column; chief; top

adj. The highest; top ; first-class; the largest

vt. form the top; reach the top of...; be at the forefront of...; leader

vi. Summary; transcend; tower; end

Third person singular: tops Plural: tops Present participle: topping Past tense: topped Past participle: topped

##left

UK[left] 美[lɛft]

adj.Left, left; leftist

n.Left, left;[military] left wing;leftist, radical

adv.To the left; on the left

v.Leave (past tense and past participle of leave)

Plural: lefts

radius

UK[ˈreɪdiəs] US[ ˈrediəs]

n. Radius; radius range; radius (distance); circular area measured by radius

Plural: radii

css border-top-left-radius property syntax

Function: Define the shape of the upper left corner border.

Syntax: border-bottom-right-radius: length|% [length|%];

Description: length Definition The shape in the upper left corner. % defines the shape of the upper left corner as a percentage value.​

Note: The length value and percentage value of the border-top-left-radius property define the radius (radii) of the quarter ellipse (the corner shape that defines the outer border edge). The first value is the horizontal radius and the second value is the vertical radius. If the second value is omitted, the first value is copied. If the length is zero, the corners are square, not round. Percentage values ​​for the horizontal radius refer to the width of the border box, while percentage values ​​for the vertical radius refer to the height of the border box.

css border-top-left-radius property example

<!DOCTYPE html>
<html>
<head>
<style> 
div
{
border:2px solid;
padding:10px;
background:#dddddd;
border-top-left-radius:2em;
-webkit-border-top-left-radius:2em; /* Safari */
}
</style>
</head>
<body>

<div>border-top-left-radius 属性允许您向左上角添加圆角边框。</div>

</body>
</html>

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